Results 21 to 30 of about 1,452 (264)

Poloidal Pressure Gradients, Divertor Detachment and Marfes [PDF]

Contributions to Plasma Physics, 1998
AbstractBecause the radiation power density from a marfe scales approximately as the square of its plasma pressure, and since increased radiation would aid divertor detachment for high power tokamaks, this paper identifies regions that might permit locally increased plasma pressure in steady state. The magnetic and dynamic (flow) constraints of magneto‐
Schaffer, M.J., M. J. Schaffer
openaire   +2 more sources

Assessment of X-point target divertor configuration for power handling and detachment front control [PDF]

Nuclear Materials and Energy, 2017
A study of long-legged tokamak divertor configurations is performed with the edge transport code UEDGE (Rognlien et al., J. Nucl. Mater. 196, 347, 1992). The model parameters are based on the ADX tokamak concept design (LaBombard et al., Nucl. Fusion 55,
M.V. Umansky, M.E. Rensink, T.D. Rognlien, B. LaBombard, D. Brunner, J.L. Terry, D.G. Whyte   +6 more
doaj   +3 more sources

Measurement of N+ flows in the high-field side scrape-off layer of ASDEX upgrade with different degrees of inner divertor detachment

Nuclear Materials and Energy, 2017
Toroidal and poloidal flows of injected N+ ions were measured in the high-field side (HFS) scrape-off layer (SOL) of ASDEX Upgrade by Doppler spectroscopy with different degrees of HFS divertor detachment.
M Groth, T Pütterich, E Viezzer
exaly   +3 more sources

Effects of low-Z and high-Z impurities on divertor detachment and plasma confinement

Nuclear Materials and Energy, 2017
The impurity-seeded detached divertor is essential for heat exhaust in ITER and other reactor-relevant devices. Dedicated experiments with injection of N2, Ne and Ar have been performed in DIII-D to assess the impact of the different impurities on ...
H.Q. Wang, H.Y. Guo, T.W. Petrie, A.W. Leonard, D.M. Thomas, J.G. Watkins   +5 more
doaj   +2 more sources

Symmetries and Asymmetries in the Divertor Detachment in ASDEX Upgrade

, 2012
Divertor detachment is a prerequisite for large burning plasma fusion devices. The understanding of the processes leading to divertor detachment is currently incomplete and a reliable prediction for future large scale devices out of reach. In the full-metal ASDEX Upgrade divertor detachment has been studied for Ohmic and L-mode density ramp discharges ...
Wischmeier, M., Potzel, S., Aho-Mantila, L., Bernert, M., Müller, H., Coster, D., Müller, H., Reimold, F.   +7 more
core   +8 more sources

SOLPS-ITER modeling of divertor detachment in MAST-U’s super-X double null configuration and comparison to experiment

Nuclear Materials and Energy
The MAST-U tokamak has recently undergone upgrades to investigate any detachment advantages of the “Super-X Double-Null” magnetic configuration, a concept featuring up-down symmetry with two magnetic nulls and elongated divertor legs with strong wall ...
R. Maurizio, A.W. Leonard, J.H. Yu, J. Harrison, K. Verhaegh, N. Lonigro, A.G. McLean   +6 more
doaj   +2 more sources

Dependence of particle and power dissipation on divertor geometry and plasma shaping in DIII-D small-angle-slot divertor

Nuclear Materials and Energy, 2022
Dedicated experiments in DIII-D find that magnetic shaping and divertor target geometry significantly affect the divertor plasma conditions and divertor detachment process in the small-angle-slot (SAS) divertor.
H.Q. Wang, X. Ma, R. Maurizio, H.Y. Guo, D.M. Thomas, J.G. Watkins, M.W. Shafer, A.W. Hyatt, A.L. Moser, J. Ren, A. McLean, F. Scotti, P. Stangeby   +12 more
doaj   +1 more source

Numerical study of divertor detachment in TCV H-mode scenarios

, 2023
International audienceThe effect of divertor closure and nitrogen seeding on the detachment process has been studied by performing 2D numerical simulations of tokamak à configuration variable (TCV) H-mode divertor scenarios with the SOLEDGE3X-EIRENE edge
Galassi, D., Yang, H., Bagnato, F., Fedorczak, N., Henderson, S., Falchetto, G., Bucalossi, J., Tamain, P., Ciraolo, G., Rivals, N., Reimerdes, H., Theiler, C., Gorno, S., Bufferand, H., Février, O.   +14 more
core   +2 more sources

A study of the influence of plasma–molecule interactions on particle balance during detachment

Nuclear Materials and Energy, 2021
In this work we provide experimental insights into the impact of plasma–molecule interactions on the target ion flux decrease during divertor detachment achieved through a core density ramp in the TCV tokamak. Our improved analysis of the hydrogen Balmer
Kevin Verhaegh, Bruce Lipschultz, James Harrison, Basil Duval, Chris Bowman, Alexandre Fil, Daljeet Singh Gahle, David Moulton, Omkar Myatra, Artur Perek, Christian Theiler, Mirko Wensing   +11 more
doaj   +1 more source

Effects of a shallow SAS divertor on detachment in KSTAR [PDF]

, 2021
For long pulse operation of fusion reactors, it is important to reduce sputter-erosion and power loading of the divertor target by means of plasma detachment.
Hur, Min Sup, Guo, Houyang, Casali, Livia, Stangeby, Peter C., Kwon, Kyu Been, Ra, Ookjoo   +5 more
core   +1 more source